2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 123Get this manual
IGNITION IGNITION SYSTEM TESTS
If meter shows less voltage, check condition of wiring and connectors If wiring and connector condition is good, go to Ohmmeter Continuity Test
Ohmmeter Ground Test
To test for grounded condition, connect ohmmeter, alternately, between each jumper and clean engine ground Any needle movement indicates sensor coil or leads are grounded Locate and repair ground, or replace sensor coil
Ohmmeter Continuity Test IMPORTANT: All ohmmeter tests must be performed with the engine NOT runningInsert jumper wires in sensor coil terminals as listed